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Finding the Fourth Proportional to 5,678.38, 8,516.56 and 1,728.68

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Solution

The fourth proportional to 5,678.38, 8,516.56 and 1,728.68 is: 2,592.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,678.38 : 8,516.56 = 1,728.68 : x
  2. Step 2: Convert to fraction form
    5,678.38/8,516.56 = 1,728.68/x
  3. Step 3: Cross multiply
    5,678.38x = 8,516.56 × 1,728.68
  4. Step 4: Simplify right side
    5,678.38x = 14,722,391.91
  5. Step 5: Solve for x
    x = 14,722,391.91/5,678.38
  6. Step 6: Final answer
    x = 2,592.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.